 Roughly a year into the downturn with the major summer harvest of salmon just starting, there are some signs of recovery. Some fishermen say they managed to turn profits even after last year's plunge in prices. And startup businesses are launching new models for processing that they say could help boost the quality and value of Alaska's catch. But major threats persist, many of which fishermen feel powerless to affect, posing existential risks to a $6 billion industry that employs more than 15,000 Alaskans.